Mark streaming feature for mobile/web apps in Clients.md
There are too many apps which are not ready for the Pleroma's streaming API. Users have to reload manually to fetch their timelines very often. !789 (merged) and !790 (merged) tried to mark the streaming feature, but !726 (merged) broke it.
This MR restores the streaming-ready marks for the
- Mobile (iOS, Android) apps
- Web clients
- Desktop apps